Bob-sled.



0. BOARD.

' BOB SLED.

APPLICATION rum) JULY 0, 1012.

THE {LORRIS PETERS PHOTO-LITHO. WASHINGTON, D. c.

PAIFENT OFFICE.

CHAR-LES BUAHJ), 01 Hf-LILEY, IDAHO.

Specification of Letters Patent.

.Pa-tcntcd Aug. 25, 1914.

Application filed July 6. 1912. Serial. No. M81119.

To all whom it may ounce/w:

Be it known that I, CHAnLns Bolus), a citizen of the United States ofAmerica, and resident of Hailey, in the county of Blaine and State oflidaho, have invented certain new and useful Improvements in Bob- Sleds,of which the following is z. specification.

This invention relates to bob sleds and has particular reference to ameans for providing the same with a brake or drag to prevent too rapidnloveu'ient of the sled when descending an inclined surface or road.

An object of this invention is to provide a bob sled having manuallyoperated rotarding means, the said retarding means comprising auxiliaryrunners or shoes having novel means for their movement with relation tothe runners of the bob sled, the said shoes having devices thereonextending transversely around the same so that that portion of thedevice extending under the shoe may act as drags by engaging the surfaceof the roadbed or the packed snow or ice over which the sled is moved.

With the foregoing and other objects in view, theinvention consists inthe details of construction and in the arrangement and combination ofparts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, referenee will be had to theaccompanying drawing forming part of this specification wherein likecharacters denote correspond ing parts in the several views, and inwhich Figure 1 illustrates a view in elevation of the side of a bob sledwith the invention applied thereto; Fig. 2 illustrates a. top plan viewof one of the sleds. Fig. 3 illustrates a side elevation of a fragmentof a bob sled with the invention applied thereto.

In these drawings a. 41-, denote the run ners of a bob sled to which thestandards 5, 5, are connected, the said standards supporting a bolster6. A hand operated arrn 8 extends from one end of the shaft 9, the saidshaft being journaled in bearings 9 on the bolster 6, and the parts areoperative to apply the brakes. The shaft has arms 9 near each end whichare adapted to operate the brake mechanism in a manner to be presentlyexplained.

The brake mechanism includes the snailiary runners 11 having their frontends pivoted to a bar 11 which extends between and. connects the frontends of the runners of the roar bob, the said auxiliary runners be ingso mounted as to oscillate freely on the cross rod. The said cross rodalso acts as. a connection for the coupling 12 which. extends to thefront bob.

lilach auxiliary runner 11 is yieldinoly suspended near its rear end. bythe sprn'lp; 13, the said spring having one end connected to theauxiliary runner and the other end to the bolster by means of the hooksor bolts ll.

Each auxiliary runner is further provided with a longitudinally disposedrecess 15 containing a wear plate 16 which is engaged by the end of oneof the arms projecting from the shaft 9, each of said arms serving topress one of the auxiliary runners dmvnwardly as the shaft is rotated inits bearings. Upon the reverse rotation, however, of the shaft from thatwhich is e'llj'cctive to depress the auxiliary runner, the spring whichis connected to the said auxiliary runner serves to elevate it to itsnor- .inal position wherein the lower edge of the auxiliary runner isfree of the roadbed or the surface over which the sled is traveling.

As a. means for augmenting the drag or dragging action of the auxiliaryrunner, wach of said auxiliary runners is provided. with a diagonallydisposed recess 17 extending along the sides and the top of theauxiliary runner, the said recess forming a seat for a metallic band 18which is fastened in place in any appropriate manner, the said bandencircling the lower edge of the auxiliary runner and beingadapted tooffer resistance to the travel of the sled when the auxiliary runner isdepressed in the manner heretofore stated. By reason of the position ofthe metallic band n the auxiliary rrmner and its being seated in therecesses, it cannot be displaced notwithstanding pontions thereofembracing the lower edge of the auxiliary runner may contactobstructions such as stones or hard projections in the roadbe By reasonof the construction just described, it will be apparent that byn'iovelnent of the operating arm 8, the shaft 9 is partially rotated,thus movingthe arms on the shaft to such a degree as to cause them toengage the wear plates on the auxiliary runners and owing to the pro-"vision of the quadrant, the said opera-ting arm may he held atdifferent positions of each runner being connected by a groove in 15 theupper and lower edges thereof, a brake band in the grooves of each,runner, said bands being held in the respective grooves, so that aportion of the bands will extend beyond the tread of the runner to whichit so is applied.

In testimony whereof, I aflix my signature in the presence of twoWitnesses.

CHARLES BOARD.

Witnesses H. A. BAKER, L. L. SULLIVAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

